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WWUS20 KWNS 111715

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URGENT - IMMEDIATE BROADCAST REQUESTED

Tornado Watch Number 424

NWS Storm Prediction Center Norman OK

1215 PM CDT Wed Aug 11 2021



The NWS Storm Prediction Center has issued a



* Tornado Watch for portions of

  Extreme northeast Iowa

  The south central Upper Peninsula of Michigan

  Extreme southeast Minnesota

  Much of central Wisconsin

  Lake Michigan



* Effective this Wednesday afternoon and evening from 1215 PM

  until 800 PM CDT.



* Primary threats include...

  A few tornadoes likely

  Scattered damaging winds and isolated significant gusts to 75

    mph likely

  Scattered large hail and isolated very large hail events to 3

    inches in diameter likely



SUMMARY...Scattered supercell development is expected this afternoon

along and ahead of a cold front moving toward central Wisconsin.

The storm environment is favorable for several tornadoes and very

large hail near the size of baseballs with the initial supercells.

Some clustering of storms could occur later this afternoon, which

would support an increasing threat for damaging wind swaths, some of

which could be significant (near 75 mph).



The tornado watch area is approximately along and 75 statute miles

east and west of a line from 15 miles northwest of Iron Mountain MI

to 35 miles south of Lonerock WI. For a complete depiction of the

watch see the associated watch outline update (WOUS64 KWNS WOU4).



PRECAUTIONARY/PREPAREDNESS ACTIONS...



REMEMBER...A Tornado Watch means conditions are favorable for

tornadoes and severe thunderstorms in and close to the watch

area. Persons in these areas should be on the lookout for

threatening weather conditions and listen for later statements

and possible warnings.



&&



OTHER WATCH INFORMATION...CONTINUE...WW 422...WW 423...



AVIATION...Tornadoes and a few severe thunderstorms with hail

surface and aloft to 3 inches. Extreme turbulence and surface wind

gusts to 65 knots. A few cumulonimbi with maximum tops to 600. Mean

storm motion vector 28030.



...Thompson

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